#include<stdio.h>
#include "myadd.h"
#include "mysub.h"
int main()
{
    int x = 10 ;
    int y =20 ;
    printf("%d + %d = %d \n",x ,y ,myadd(x,y));
    printf("%d - %d = %d \n",x ,y ,mysub(x,y));
}